<!-- 
  首页-热门推荐模块分包
 -->
<script setup lang="ts">
  import { ref } from 'vue'
  import { reqRecommend } from '@/api/hot'
  import type { SubTypesItem } from '@/types/hot'
  import { onLoad } from '@dcloudio/uni-app'
  // 热门推荐页 标题和url
  const hotMap = [
    { type: '1', title: '特惠推荐', url: '/hot/preference' },
    { type: '2', title: '爆款推荐', url: '/hot/inVogue' },
    { type: '3', title: '一站买全', url: '/hot/oneStop' },
    { type: '4', title: '新鲜好物', url: '/hot/new' }
  ]
  // 获取页面参数
  const query = defineProps<{
    type: string
  }>()
  const currMap = hotMap.find(item => item.type === query.type)
  // 动态设置标题
  uni.setNavigationBarTitle({
    title: currMap!.title
  })

  // 推荐封面图
  const bannerPicture = ref('')
  // Tab 选项
  const subTypes = ref<(SubTypesItem & { finish?: boolean })[]>([])
  // 下标高亮
  const activeIndex = ref(0)
  // 获取热门推荐数据
  const getHotData = async () => {
    const res = await reqRecommend(currMap!.url, {
      page: 1
    })
    bannerPicture.value = res.result.bannerPicture
    subTypes.value = res.result.subTypes
  }
  // 点击 Tab 回调
  const tabChange = (index: number) => {
    activeIndex.value = index
  }

  // 滚动触底的回调
  const onScrolltolower = async (index: number) => {
    // 获取当前选项
    const currenSubTypes = subTypes.value[index]
    if (currenSubTypes.goodsItems.page < currenSubTypes.goodsItems.pages) {
      // 重新发起请求
      // 页面自增
      currenSubTypes.goodsItems.page++
      const res = await reqRecommend(currMap!.url, {
        page: currenSubTypes.goodsItems.page,
        pageSize: 10,
        subType: currenSubTypes.id
      })
      // 当前列表选项追加新数据
      currenSubTypes.goodsItems.items = [
        ...currenSubTypes.goodsItems.items,
        ...res.result.subTypes[index].goodsItems.items
      ]
    } else {
      // 结束
      currenSubTypes.finish = true
      return uni.showToast({
        icon: 'none',
        title: '没有更多了~'
      })
    }
  }
  onLoad(() => {
    getHotData()
  })
</script>

<template>
  <view class="viewport">
    <!-- 推荐封面图 -->
    <view class="cover">
      <image :src="bannerPicture"></image>
    </view>
    <!-- 推荐选项 -->
    <view class="tabs">
      <text
        class="text"
        v-for="(item, index) in subTypes"
        :key="item.id"
        :class="{ active: index === activeIndex }"
        @click="tabChange(index)"
      >
        {{ item.title }}
      </text>
    </view>
    <!-- 推荐列表 -->
    <scroll-view
      scroll-y
      class="scroll-view"
      v-for="(item, index) in subTypes"
      :key="item.id"
      v-show="index === activeIndex"
      @scrolltolower="onScrolltolower(index)"
    >
      <view class="goods">
        <navigator
          hover-class="none"
          class="navigator"
          v-for="goods in item.goodsItems?.items"
          :key="goods.id"
          :url="`/pagesDetail/detail/detail?id=${goods.id}`"
        >
          <image class="thumb" :src="goods.picture"></image>
          <view class="name ellipsis">{{ goods.name }}</view>
          <view class="price">
            <text class="symbol">¥</text>
            <text class="number">{{ goods.price }}</text>
          </view>
        </navigator>
      </view>
      <view class="loading-text">{{ item.finish ? '已经到底啦' : '正在加载...' }}</view>
    </scroll-view>
  </view>
</template>

<style lang="scss">
  page {
    height: 100%;
    background-color: #f4f4f4;
  }
  .viewport {
    display: flex;
    flex-direction: column;
    height: 100%;
    padding: 180rpx 0 0;
    position: relative;
  }
  .cover {
    width: 750rpx;
    height: 225rpx;
    border-radius: 0 0 40rpx 40rpx;
    overflow: hidden;
    position: absolute;
    left: 0;
    top: 0;
  }
  .scroll-view {
    flex: 1;
  }
  .tabs {
    display: flex;
    justify-content: space-evenly;
    height: 100rpx;
    line-height: 90rpx;
    margin: 0 20rpx;
    font-size: 28rpx;
    border-radius: 10rpx;
    box-shadow: 0 4rpx 5rpx rgba(200, 200, 200, 0.3);
    color: #333;
    background-color: #fff;
    position: relative;
    z-index: 9;
    .text {
      margin: 0 20rpx;
      position: relative;
    }
    .active {
      &::after {
        content: '';
        width: 40rpx;
        height: 4rpx;
        transform: translate(-50%);
        background-color: #27ba9b;
        position: absolute;
        left: 50%;
        bottom: 24rpx;
      }
    }
  }
  .goods {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    padding: 0 20rpx 20rpx;
    .navigator {
      width: 345rpx;
      padding: 20rpx;
      margin-top: 20rpx;
      border-radius: 10rpx;
      background-color: #fff;
    }
    .thumb {
      width: 305rpx;
      height: 305rpx;
    }
    .name {
      height: 88rpx;
      font-size: 26rpx;
    }
    .price {
      line-height: 1;
      color: #cf4444;
      font-size: 30rpx;
    }
    .symbol {
      font-size: 70%;
    }
    .decimal {
      font-size: 70%;
    }
  }

  .loading-text {
    text-align: center;
    font-size: 28rpx;
    color: #666;
    padding: 20rpx 0 50rpx;
  }
</style>
